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On Thu, 13 Jun 2002, Bryan Fodness wrote: > *** Discussion title: Run Management > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/runmanage/11"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > I am trying to get an angular distribution of the recoil target nuclei > produced by 63 MeV protons in silicon. I have to run a large number of > particles to get a sufficient amount of elastic and inelastic collisions > and the output is becoming very large (~3Gb). Rather than writing every > particle that is created and parsing the output, I would like to write > only the information that deals with a specific physics process. > > Can I write to an output, including the parent, only the tracks in which > its parent undergoes an elastic or inelastic collision? > > I would like to have the information of Track ID 993 and all its > constituents written to the output file but not Track ID 994. The simplest way is to create your own UserTrackingAction or/and UserSteppingAction -> all information about tracks and step will be available and can be castomised for print out or histograms. VI
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